Finding the Fourth Proportional to 45.71, 68.60 and 39.31
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Solution
The fourth proportional to 45.71, 68.60 and 39.31 is: 58.99
Step by Step Solution
- Step 1: Write the proportion equation
45.71 : 68.60 = 39.31 : x - Step 2: Convert to fraction form
45.71/68.60 = 39.31/x - Step 3: Cross multiply
45.71x = 68.60 × 39.31 - Step 4: Simplify right side
45.71x = 2,696.56 - Step 5: Solve for x
x = 2,696.56/45.71 - Step 6: Final answer
x = 58.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.